Adjustable cam for circular-knitting machines.



PATENTED DEC. 13, 1904.

' W. T. BARRATT. V ADJUSTABLE 0AM FDR CIRCULAR KNITTING MACHINES.

APPLICATION FILED I'll-13.23, 1904.

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N0. 777,063. Patented December 13, 1904.

UNITED STATES PATENT OFFICE.

VVILL IAM T. BARRATT, OF BENNINGTON, VERMONT, ASSIGNOR TO CHARLES COOPER, OF BENNINGTON, VERMONT.

ADJUSTABLE CAM FOR CIRCULAR-KNITTING MACHINES.

SPECIFICATION forming part of Letters Patent No. 777,063, dated December 13, 1904.

Application filed February 23, 1904. $e1'ial N0. 19 L640. (N model.)

To h it i l fimwern! with, and upon the inner face of said flange Be it known that LWILLIAM T. BARRATT, a adjacent to the needle-cylinder 11 are formed citizen of the United States, residing at Benways 18. A slide 19 is adapted to be moved nington, in the county of Bennington and State up and down in said ways and has fastened to 5 of Vermont, have invented new and useful the inner face thereof an inclined cam-plate Improvements in Adjustable Cams for Oircu- 20, adapted to engage thejacks 21 of the lower lar-KnittingMachines, of which the following cylinder-needles 12 and move them down- 55 is a specification. wardly in the tracks of said cylinder. The This invention relates to an improved cam slide 19 is moved upwardly or downwardly 1 for circular-knitting machines, the object of by means of a lever 22, pivoted upon a screw the invention being to provide a cam which 23, fast to the flange 17 and engaging a clampcan be adjusted so as to regulate the throw or screw 2 1, which projects through an elongated 6O distance to which the needles in said machine slot in said lever and also through a slot may be raised or lowered and which can be 26, formed in the flange 17 and into the slide 5 adjusted quickly and with precision when the 19, with which said clamp-screw 2 1 has screwdilferent parts of the machine are assembled threaded engagement. without inconvenience and without interfer- An arm 27 is pivoted to rock upon the flange 5 ing with any of said parts. 17 by a shank 28, integral therewith and hav- The invention consists in the combination ing screw-threaded engagement with said 20 and arrangement of parts set forth in the folflange. The arm 27 projects into and through lowing specification, and particularly pointed an orifice or slot 29, formed in the lever 22, and out in the claims thereof. has a screw-driverslot formed therein, by 7 Referring to the drawings, Figure 1 is a means of which it may be rocked upon its front elevation of my improved cam. Fig. 2 pivot. The slot 29 is substantially triangular 5 is a rear elevation of the same. Fig. 3 is a in shape, the end 29 being of greater width section taken on line 3 3 of Fig. 1, illustratthan the end 29 of said slot, the arm 27 being in addition to said cam aportion of a me ing pivoted in the wider end 29 of said slot die-cylinder of a circular-knitting machine. to allow the lever 22 to be rocked upon its Fig. 1 is a detail section taken on line 1 4 of pivot 23.

3 Fig. 1. Fig. 5 is a detail front elevationof Toadjustthecam-plate20 upwardlyordownthe cam-adjusting lever. Fig. 6 is a detail war'dly, the clamyrscrew 24 is loosened and front and side elevation of the arm by means the arm 27 is rotated toward the right or left of which said lever is rocked upon its pivot. by means of a screw-driver, raising or lower- Like numerals refer to like parts throughing, respectively, the lever 22 and through 35 out the several views of the drawings. the screw 21 the slide 19, with the cam-plate Inthe drawings, 10 is the lower bed of a 20 attached thereto. After the cam-plate has circular-knitting machine; 11, the lower cylbeen moved as much as may be desired up or 5 inder of said machine; 12, a lower cylinderdown said cam-plate 20, slide 19, and lever needle, and 13 the lower rotary ring, to which 22 are clamped to the vertical flange 17 by 4 the lower cylinder 11 is fastened, said ring tightening the clamp-screw 2 1. The camand cylinder having a rotary motion imparted plate 20 is in the present instance a cam-plate thereto by a gear 14, fast to said ring 13, and for drawing down the needles of the lower 9 driven by a pinion (not shown) in a manner cylinder; but it is evident that the same dewell known to those skilled in this art. vice may be utilized for raising and lowering 45 My improved adjustable cam comprises a cam-plates ofvarious shapes and inclinations bracket 15, rigidly fastened to the lower bed without departing from the spirit of my in- 10 by means of screws 16. Said bracket has vention. avertically-extending flange 17 integral there- The advantage secured from my adjustable cam is that by the use of a screw-driver the cam-plate may be raised or lowered to a very slight extent and conveniently reached for such adjustment without interfering with any of the other devices such as presser-stands, brackets, and the likewhich are assembled around the needle-cylinders of a circular-knitting machine in a manner well known to those skilled in this art.

Having thus described my invention, what I claim, and desire by Letters Patent to secure,

1. An ad just-able cam for knitting-machines comprising a bracket, ways formed in said bracket, a slide adapted to be moved in said ways, a cam-plate fast to said slide, a screw having screw-threaded engagement with said slide, a lever pivoted to said bracket and engaging said screw, and means to positively rock said lever in opposite directions and raise and lower said screw and cam-plate.

2. An adjustable cam for knitting-machines comprising a bracket, ways formed in said bracket, a slide adapted to be moved in said ways, a cam-plate fast to said slide, a screw having screw-threaded engagement with said slide, a lever provided with a slot and pivoted to said bracket and engaging said screw, means to positively rock said lever in opposite directions and raise and lower said screw and cam-plate, consisting of an arm pivoted to said bracket and projecting into said slot provided in said lever, whereby said lever may be positively rocked in opposite directions upon its pivot and said slide and camplate positively raised and lowered.

8. An adjustable cam for knitting-machines comprising a bracket having a vertically-projecting flange thereon, a cam-plate fast to the inner face of said flange, a lever provided with a slot and pivoted to the outer face of said flange and connected to said cam-plate, and an arm pivoted to said flange and projecting into said slot provided in said lever, whereby said lever may be positively rocked in opposite directions upon its pivot and said slide and cam-plate positively raised and lowered.

4. An adjustable cam for knitting-machines comprising a bracket, ways formed in said bracket, a slide adapted to be moved in said ways, a cam-plate fast to said slide, a screw having screw-threaded engagement with said slide, a lever provided with a slot and pivoted to said bracket and engaging said screw, means to positively rock said lever in opposite directions and raise and lower said screw and cam-plate, consisting of an arm pivoted to said bracket and projecting into said slot provided in said lever, whereby said lever may be positively rocked in opposite directions upon its pivot and said slide and camplate positively raised and lowered, said slot being of different widths at the opposite ends thereof, respectively.

5. An adjustable cam for knitting-machines comprising a bracket, ways formed in said bracket, a slide adapted to be moved in said ways, a cam-plate fast to said slide, a screw having screw-threaded engagement with said slide, a lever provided with a slot and pivoted to said bracket and engaging said screw, means to positively rock said lever in opposite directions and raise and lower said screw and cam-plate, consisting of an arm pivoted to said bracket and projecting into said slot provided in said lever, whereby said lever may be positively rocked in opposite directions upon its pivot and said slide and cam-plate positively raised and lowered, said slot being of different widths at the opposite ends thereof, respectively, the pivoted end of said arm located in the wider end of said slot.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

WILLIAM T. BARRATT.

WVitnesses:

CHARLES S. KEHOE, EARL A. SMITH. 

